Thursday, November 11, 2010

After publishing a post about the possible Dangers in using cooking oil, we have received many emails asking about the validity of that post. Some distinguished readers asked for a proof that the ideas stated on the post are correct. In this post, we would like to share the sources from which we decided to make such a post. Also, there are numerous studies going on in this subject in various universities worldwide.

Kindly note that in some countries, the health authorities permitting to reuse cooked oil, with certain conditions. They have set some protocols in the first use of cooking oil. Hopes that these links will help you to get an idea about how the world takes this matter on.

Chinese Government Orders to stop reusing cooked oil

While the government order did not specify a health risk, state media and industry experts said the recycled oil could have carcinogens and traces of aflatoxin, a potentially deadly mold.

"There's only a slim chance that you will be poisoned immediately afterwards if you eat this 'gutter oil,'" said Zheng Fengtian, a food safety expert at Renmin University in Beijing. "The biggest problem is that after eating this overcooked oil, people could -- though some don't -- develop cancer in 10 or 20 years."

1. University of Minnesota researchers A. Saari Csallany, a professor of food chemistry and nutritional biochemistry, and graduate student Christine Seppanen have shown that when highly unsaturated vegetable oils are heated at frying temperature (365 F) for extended periods--or even for half an hour--a highly toxic compound, HNE (4-hydroxy-trans-2-nonenal) forms in the oil.

Csallany's work underscores the risk of repeated heating, or reusing, highly unsaturated oils for frying because HNE accumulates with each heating cycle. In future studies, Csallany and her colleagues plan to determine how long polyunsaturated oil must be heated at lower temperatures in order to form HNE and its related compounds. The study was funded by the University of Minnesota.

2 comments:

Anonymous
said...

Great post! I’m looking to make some changes in my own eating habits, so I appreciate your insight a lot! Thank you. I recently stumbled upon this blog like I did yours and I thought your readers may appreciate it: http://burisonthecouch.wordpress.com/2010/11/04/food-for-thought/

I’ve started to look for their stuff more regularly and I think I’m going to add your blog to my list as well. Thanks for the post!